|Publication number||US6770099 B2|
|Application number||US 10/299,436|
|Publication date||Aug 3, 2004|
|Filing date||Nov 19, 2002|
|Priority date||Nov 19, 2002|
|Also published as||CA2449287A1, CA2449287C, EP1421920A2, EP1421920A3, US20040098132|
|Publication number||10299436, 299436, US 6770099 B2, US 6770099B2, US-B2-6770099, US6770099 B2, US6770099B2|
|Inventors||Thomas Andriacchi, Ron Donkers, James Harris, Audrey Patmore, Scott Steffensmeier, Shinro Takai, Linggawati Tanamal, Peter Walker|
|Original Assignee||Zimmer Technology, Inc.|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (7), Referenced by (109), Classifications (5), Legal Events (7)|
|External Links: USPTO, USPTO Assignment, Espacenet|
1. Field of the Invention
The present invention relates generally to orthopedic prosthetic devices. More specifically, the invention relates to a femoral orthopedic knee implant for use in conjunction with a total knee arthroplasty (“TKA”), wherein the femoral component is designed to accommodate a broader range of knee flexion than femoral components known in the art.
2. Description of the Related Art
Disease and trauma affecting the articular surfaces of the knee joint are commonly effectively treated by surgically replacing the articulating ends of the femur and tibia with prosthetic femoral and tibial implants, referred to as total knee replacements (“TKR”). These implants are made of materials that exhibit a low coefficient of friction as they articulate against one another so as to restore normal, pain free, knee function.
As a knee joint moves through a ROM, the angle of the distal femur relative to the mechanical axis of the person's leg changes. During high flexion, this change is even more pronounced. For example, as a person's natural knee is moved through a ROM from about 0° to about 155°, the angle of femoral rotation about the transverse axis which is perpendicular to the mechanical axis of the person's leg may move from about 10° at to about 30°.
Most TKRs, however, include femoral components that are designed to accommodate knee joint articulation from a position of slight hyper extension to approximately 115° to 130° of flexion. However, the healthy human knee is capable of a range of motion (“ROM.”) approaching 170° of flexion, and a ROM in around 155° is required for deep kneeling and squatting as may be required during some sporting, religious or cultural events.
There is a need, therefore, for an improved TKR femoral component that accommodates knee °flexion, under optimal conditions, of more than 130° (“high flexion”).
The present invention comprises, in one embodiment thereof, an improved femoral prosthesis for a TKR. The femoral component of the TKR comprises an internal non-articulating bone contacting surface adapted to receive a resected distal femur. In a preferred embodiment, the bone contacting surfaces of the femoral component include anterior, distal, and posterior chamfer surfaces, which may further comprise bone growth promoting surfaces attached thereto.
The femoral component further comprises anterior, distal, medial posterior and, lateral posterior articulating portions, referred to herein as medial and lateral posterior condyles. The medial and lateral condyles each comprise a unique “height.” The height of each condyle is measured from a line tangent to the distal articulating surface to the proximal tip of a particular condyle. The differences in the medial and lateral condylar height of a prosthetic femoral component according to the present invention permit a larger angle of femoral rotation in a TKR about the mechanical axis of a patient's leg. In addition, the extent to which the medial aspect of the lateral femoral condyle extends into the intercondylar region of the femoral prosthetic component is reduced in the present invention to accommodate high flexion.
An advantage of the present invention is that it allows greater rotation of the distal femur about a leg's mechanical axis. This greater rotation is necessary to, and therefore accommodates, high flexion in a patient's knee.
Other advantages and features of the present invention will be apparent to those skilled in the art upon a review of the appended claims and drawings.
The above-mentioned and other features and objects of this invention, and the manner of obtaining them, will become more apparent and the invention itself will be better understood by reference to the following description of an embodiment of the invention taken in conjunction with the accompanying drawings, wherein:
FIG. 1 is a side view of an embodiment of the present invention showing the difference in the medial and lateral condyle heights.
FIG. 2 is a posterior view of the embodiment shown in FIG. 1.
FIG. 3 is an anterior view of a human femur, tibia, knee joint, and leg mechanical axis.
FIG. 4 is an anterior view of the embodiment shown in FIG. 1.
FIG. 5 is a superior view of the embodiment of FIG. 1, showing the rotation of the present invention between no flexion and high flexion.
Corresponding reference characters indicate corresponding parts throughout the several views. Although the drawings represent an exemplary embodiment of the present invention, the drawings are not necessarily to scale and certain features may be exaggerated to better illustrate and explain the invention. The exemplification set out herein illustrates an exemplary embodiment of the invention only and such exemplification.
As used herein, the following directional definitions apply. Anterior and posterior mean nearer the front or nearer the back of the body respectively. Thus, for the knee joint described herein, anterior refers to that portion of the knee that is nearer the front of the body, when the leg is in an extended position. Proximal and distal mean nearer to or further from the root of the structure, respectively. For example, the distal femur is a part of the knee joint while the proximal femur is closer to the hip joint. Finally, the adjectives medial and lateral mean nearer the sagittal plane or further from the sagittal plane respectfully. The sagittal plane is an imaginary vertical plane through the middle of the body that divides the body into right and left halves.
Referring initially to FIG. 1, a femoral component 100 of a TKR according to one embodiment of the present invention comprises an external articulating surface 110 and a bone contacting non-articulating internal surface 150. Articulating surface 110 comprises an anterior articulating surface 115, a distal articulating surface 125, a medial posterior condylar articulating surface 135, and a lateral articulating condylar surface 145.
Femoral component 100 may comprise any biocompatible material having the mechanical properties necessary to function as a human knee distal femoral prosthesis. Preferably, femoral component 100 comprises titanium, titanium alloy, cobalt chrome alloy, stainless steel, or a ceramic.
The internal non-articulating portion of femoral component 100 is adapted to receive a resected distal femur 105, as shown in FIG. 5. The surgical cuts made to distal femur 105 can be made by any means, in any sequence and in any configuration known to those of skill in the art of knee arthroplasty. In a preferred embodiment, femoral component 100 comprises a plurality of chamfer surfaces corresponding to a plurality of chamfer surfaces made in distal femur 105. Surface 150 may comprise a porous metal surface or any surface likely to promote the growth of bone therein.
Non-articular surface 150 of femoral component 100 preferably comprises anterior non-articular surface 155, distal anterior non-articular surface 165, distal non-articular surface 175, two distal posterior non-articular surfaces 185, and two posterior non-articular surfaces 195.
Distal non-articular surface 175 is generally flat and adapted to receive the distal most surface of resected femur 105. Surface 175 comprises two opposing ends. One end of surface 175 abuts one end of distal anterior non-articular surface 165, which surface 165 also comprises two opposing ends. The remaining end of surface 165 extends from surface 175 anteriorly and superiorly such that an obtuse angle is formed between each surface 165 and surface 175. Anterior non-articular surface 155 extends superiorly from the remaining end of surface 165.
The opposing end of distal non-articular surface 175 abuts one end of each distal posterior non-articular surface 185, which surfaces 185 also comprise two opposing ends. The remaining end of surface 185 extends from surface 175 posteriorly and superiorly such that an obtuse angle is formed between each surface 165 and surface 175. Posterior non-articular surfaces 195 extend superiorly from the remaining ends of surfaces 185, respectively.
Referring still to FIG. 1, external articulating surface 110 of femoral component 100 comprises an anterior articulating surface 115, a distal articulating surface 125, a medial posterior condylar articulating surface 135, and a lateral posterior articulating condylar surface 145. The various articulating surfaces comprising articulating surface 110 of the present invention form a single curved surface having a vaiable radius adapted to engage cooperatively with a prosthetic knee meniscal component.
In the preferred embodiment of the present invention, condylar surfaces 135 and 145 comprise differing intermediate radii 136 and 146, respectively. The intermediate radius of each condylar surface is that portion of the articular surface between the distal articular surface and the posterior articular surface. The lateral condylar intermediate radius 36 is larger in the preferred embodiment than the medial intermediate radius 146.
Referring again to FIG. 1, there is shown line 110 tangent to distal ticulating surface 125, and heights “A” and “B” showing the heights of medial and lateral condylar articulating surfaces 135 and 145, respectively. As shown in FIG. 1, the height A of lateral condyle 145 is less than the height, B, of medial condyle 135. This difference in condylar heights is also shown in FIG. 2. In the preferred embodiment, the difference in condylar heights is from about 1 mm to about 5 mm; however those of skill in the art will appreciate that a broad range of height differentials may be employed with the present invention.
Referring now to FIG. 3, there is shown a front view of right leg 101 in full extension comprising femur 105, artificial femoral component 100, prosthetic meniscal component 102, prosthetic tibial component 104, and tibia 107. There is further shown line 109 representing the mechanical axis of leg 101 . As leg 101 flexes, it is necessary for femoral component 100 to rotate medially about mechanical axis 109. The condylar height differential of femoral component 100 in the present invention allows sufficient rotation to accommodate high flexion. In addition, the width of lateral condyle 145 is truncated such that the distance between the lateral and medial sides of lateral condyle 135 is less than the distance between the lateral and medial sides of medial condyle 145 to further enhance the ability of femoral component 100 to achieve high flexion in a range from about 130° to 170°, or at least above about 150° without interfering with adjacent soft tissues.
It will be appreciated by those skilled in the art that the foregoing is a description of a preferred embodiment of the present invention and that variations in design and construction may be made to the preferred embodiment without departing from the scope of the invention as defined by the appended claims.
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US5549688 *||Aug 4, 1994||Aug 27, 1996||Smith & Nephew Richards Inc.||Asymmetric femoral prosthesis|
|US5681354 *||Feb 20, 1996||Oct 28, 1997||Board Of Regents, University Of Colorado||Asymmetrical femoral component for knee prosthesis|
|US6056779 *||Jul 8, 1998||May 2, 2000||Societe Ortho-Id||Prosthesis for the knee articulation|
|US6123729 *||Mar 10, 1998||Sep 26, 2000||Bristol-Myers Squibb Company||Four compartment knee|
|US6152960 *||Jan 7, 1999||Nov 28, 2000||Biomedical Engineering Trust I||Femoral component for knee endoprosthesis|
|US6235060 *||Nov 12, 1997||May 22, 2001||Hjs Gelenk System Gmbh||Artificial joint, in particular endoprosthesis for replacing natural joints|
|US6402786 *||Jun 29, 2000||Jun 11, 2002||Zimmer, Inc.||Four compartment knee|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US7326252||Dec 22, 2003||Feb 5, 2008||Smith & Nephew, Inc.||High performance knee prostheses|
|US7799084||Oct 23, 2003||Sep 21, 2010||Mako Surgical Corp.||Modular femoral component for a total knee joint replacement for minimally invasive implantation|
|US7837737||Aug 15, 2006||Nov 23, 2010||Howmedica Osteonics Corp.||Femoral prosthesis|
|US7922771||Apr 12, 2011||Smith & Nephew, Inc.||High performance knee prostheses|
|US7981159||Jul 16, 2008||Jul 19, 2011||Depuy Products, Inc.||Antero-posterior placement of axis of rotation for a rotating platform|
|US8021432||Oct 11, 2006||Sep 20, 2011||Biomet Manufacturing Corp.||Apparatus for use of porous implants|
|US8036729||Jan 22, 2004||Oct 11, 2011||The Board Of Trustees Of The Leland Stanford Junior University||Assessing the condition of a joint and devising treatment|
|US8066778||Nov 29, 2011||Biomet Manufacturing Corp.||Porous metal cup with cobalt bearing surface|
|US8070821||Dec 6, 2011||Howmedica Osteonics Corp.||Hybrid femoral implant|
|US8123814||Jun 26, 2007||Feb 28, 2012||Biomet Manufacturing Corp.||Method and appartus for acetabular reconstruction|
|US8142886||Jul 24, 2008||Mar 27, 2012||Howmedica Osteonics Corp.||Porous laser sintered articles|
|US8147861||Aug 15, 2006||Apr 3, 2012||Howmedica Osteonics Corp.||Antimicrobial implant|
|US8160345||Apr 18, 2011||Apr 17, 2012||Otismed Corporation||System and method for image segmentation in generating computer models of a joint to undergo arthroplasty|
|US8187335||Jun 30, 2008||May 29, 2012||Depuy Products, Inc.||Posterior stabilized orthopaedic knee prosthesis having controlled condylar curvature|
|US8192498||Jun 30, 2008||Jun 5, 2012||Depuy Products, Inc.||Posterior cructiate-retaining orthopaedic knee prosthesis having controlled condylar curvature|
|US8197550||Jun 12, 2012||Biomet Manufacturing Corp.||Method and apparatus for use of porous implants|
|US8202323||Jul 16, 2008||Jun 19, 2012||Depuy Products, Inc.||Knee prostheses with enhanced kinematics|
|US8206451||Jun 26, 2012||Depuy Products, Inc.||Posterior stabilized orthopaedic prosthesis|
|US8221430||Dec 18, 2007||Jul 17, 2012||Otismed Corporation||System and method for manufacturing arthroplasty jigs|
|US8236061||Jun 19, 2009||Aug 7, 2012||Depuy Products, Inc.||Orthopaedic knee prosthesis having controlled condylar curvature|
|US8265730||Sep 11, 2012||The Board Of Trustees Of The Leland Stanford Junior University||Assessing the condition of a joint and preventing damage|
|US8266780||Sep 18, 2012||Biomet Manufacturing Corp.||Method and apparatus for use of porous implants|
|US8268099||Apr 22, 2009||Sep 18, 2012||Howmedica Osteonics Corp.||Laser-produced porous surface|
|US8268100||Jul 26, 2010||Sep 18, 2012||Howmedica Osteonics Corp.||Laser-produced porous surface|
|US8292967||Oct 23, 2012||Biomet Manufacturing Corp.||Method and apparatus for use of porous implants|
|US8306601||Aug 13, 2011||Nov 6, 2012||The Board Of Trustees Of The Leland Stanford Junior University||Assessing the condition of a joint and devising treatment|
|US8311306||Apr 14, 2009||Nov 13, 2012||Otismed Corporation||System and method for image segmentation in generating computer models of a joint to undergo arthroplasty|
|US8350186||Jan 8, 2013||Howmedica Osteonics Corp.||Laser-produced implants|
|US8369926||Feb 5, 2013||The Board Of Trustees Of The Leland Stanford Junior University||Assessing the condition of a joint and devising treatment|
|US8394147||Mar 12, 2013||Smith & Nephew, Inc.||High performance femoral knee prostheses|
|US8394148||Nov 23, 2010||Mar 12, 2013||Smith & Nephew, Inc.||Tibial component of high performance knee prosthesis|
|US8398715||Mar 19, 2013||Smith & Nephew, Inc.||High performance knee prostheses with converging anterior and posterior portions|
|US8398716||Nov 23, 2010||Mar 19, 2013||Smith & Nephew, Inc.||High performance knee prostheses with posterior cam|
|US8403992||Mar 26, 2013||Smith & Nephew, Inc.||High performance knee prostheses|
|US8425617||Nov 23, 2010||Apr 23, 2013||Smith & Nephew, Inc.||Knee prostheses with convex slope on portion of tibial articular surface|
|US8449618||May 28, 2013||Smith & Nephew, Inc.||High performance knee prostheses|
|US8460302||Jun 11, 2013||Otismed Corporation||Arthroplasty devices and related methods|
|US8460303||Oct 25, 2007||Jun 11, 2013||Otismed Corporation||Arthroplasty systems and devices, and related methods|
|US8480679||Apr 29, 2008||Jul 9, 2013||Otismed Corporation||Generation of a computerized bone model representative of a pre-degenerated state and useable in the design and manufacture of arthroplasty devices|
|US8483469||Oct 2, 2012||Jul 9, 2013||Otismed Corporation||System and method for image segmentation in generating computer models of a joint to undergo arthroplasty|
|US8532361||Jan 25, 2012||Sep 10, 2013||Otismed Corporation|
|US8545509||Sep 21, 2009||Oct 1, 2013||Otismed Corporation||Arthroplasty system and related methods|
|US8551181||Feb 27, 2012||Oct 8, 2013||Biomet Manufacturing, Llc||Method and apparatus for acetabular reconstruction|
|US8556981||Sep 18, 2009||Oct 15, 2013||Howmedica Osteonics Corp.||Laser-produced porous surface|
|US8603178||Nov 23, 2010||Dec 10, 2013||Smith & Nephew, Inc.||Knee prostheses with convex portion on tibial lateral articular surface|
|US8617171||Apr 13, 2011||Dec 31, 2013||Otismed Corporation||Preoperatively planning an arthroplasty procedure and generating a corresponding patient specific arthroplasty resection guide|
|US8617175||Dec 14, 2009||Dec 31, 2013||Otismed Corporation||Unicompartmental customized arthroplasty cutting jigs and methods of making the same|
|US8636807||Sep 4, 2008||Jan 28, 2014||Depuy (Ireland)||Moment induced total arthroplasty prosthetic|
|US8647389||Dec 17, 2010||Feb 11, 2014||Smith & Nephew, Inc.||High performance knee prostheses|
|US8652210||Nov 23, 2010||Feb 18, 2014||Smith & Nephew, Inc.||Femoral prostheses with lateral buttress for patella|
|US8715291||Aug 24, 2009||May 6, 2014||Otismed Corporation||Arthroplasty system and related methods|
|US8728387||Dec 6, 2005||May 20, 2014||Howmedica Osteonics Corp.||Laser-produced porous surface|
|US8734455||Feb 23, 2009||May 27, 2014||Otismed Corporation||Hip resurfacing surgical guide tool|
|US8734522||Jun 20, 2012||May 27, 2014||Depuy (Ireland)||Posterior stabilized orthopaedic prosthesis|
|US8737700||Apr 14, 2010||May 27, 2014||Otismed Corporation||Preoperatively planning an arthroplasty procedure and generating a corresponding patient specific arthroplasty resection guide|
|US8747479||Apr 26, 2012||Jun 10, 2014||Michael A. McShane||Tibial component|
|US8777875||Jul 17, 2009||Jul 15, 2014||Otismed Corporation||System and method for manufacturing arthroplasty jigs having improved mating accuracy|
|US8784496||Jun 4, 2012||Jul 22, 2014||Depuy (Ireland)||Orthopaedic knee prosthesis having controlled condylar curvature|
|US8795380||Jul 2, 2012||Aug 5, 2014||Depuy (Ireland)||Orthopaedic knee prosthesis having controlled condylar curvature|
|US8801719||Dec 28, 2012||Aug 12, 2014||Otismed Corporation||Total joint arthroplasty system|
|US8801720||Dec 18, 2006||Aug 12, 2014||Otismed Corporation||Total joint arthroplasty system|
|US8808387||Jan 26, 2012||Aug 19, 2014||Epic Ortho, LLC||Prosthetic joint|
|US8828086||Jun 30, 2008||Sep 9, 2014||Depuy (Ireland)||Orthopaedic femoral component having controlled condylar curvature|
|US8834575||May 28, 2012||Sep 16, 2014||Depuy (Ireland)||Posterior stabilized orthopaedic knee prosthesis having controlled condylar curvature|
|US8862202||Sep 10, 2012||Oct 14, 2014||The Board Of Trustees Of The Leland Stanford Junior University||Assessing the condition of a joint and preventing damage|
|US8915965||May 7, 2009||Dec 23, 2014||Depuy (Ireland)||Anterior stabilized knee implant|
|US8926709||Aug 11, 2011||Jan 6, 2015||Smith & Nephew, Inc.||Structures for use in orthopaedic implant fixation and methods of installation onto a bone|
|US8968320||Jun 5, 2012||Mar 3, 2015||Otismed Corporation||System and method for manufacturing arthroplasty jigs|
|US8992703||Sep 6, 2012||Mar 31, 2015||Howmedica Osteonics Corp.||Laser-produced porous surface|
|US9017336||Jan 19, 2007||Apr 28, 2015||Otismed Corporation||Arthroplasty devices and related methods|
|US9023111 *||Jul 31, 2013||May 5, 2015||New York University||Total knee replacement substituting function of anterior cruciate ligament|
|US9084679||May 3, 2013||Jul 21, 2015||The General Hospital Corporation||Prosthesis and method for using prosthesis to facilitate deep knee flexion|
|US9119723||Jun 27, 2012||Sep 1, 2015||Depuy (Ireland)||Posterior stabilized orthopaedic prosthesis assembly|
|US9135374||Apr 6, 2012||Sep 15, 2015||Howmedica Osteonics Corp.||Surface modified unit cell lattice structures for optimized secure freeform fabrication|
|US9168145||Jun 27, 2012||Oct 27, 2015||Depuy (Ireland)||Posterior stabilized orthopaedic knee prosthesis having controlled condylar curvature|
|US9173744 *||Sep 9, 2011||Nov 3, 2015||Zimmer Gmbh||Femoral prosthesis with medialized patellar groove|
|US9180010||Sep 14, 2012||Nov 10, 2015||Howmedica Osteonics Corp.||Surface modified unit cell lattice structures for optimized secure freeform fabrication|
|US9204968||Apr 21, 2014||Dec 8, 2015||Depuy (Ireland)||Posterior stabilized orthopaedic prosthesis|
|US9208263||Dec 31, 2012||Dec 8, 2015||Howmedica Osteonics Corporation|
|US9220601||Aug 6, 2014||Dec 29, 2015||Depuy (Ireland)||Orthopaedic femoral component having controlled condylar curvature|
|US9254197||Dec 18, 2013||Feb 9, 2016||Depuy (Ireland)||Moment induced total arthroplasty prosthetic|
|US9286686||Feb 26, 2007||Mar 15, 2016||The Board Of Trustees Of The Leland Stanford Junior University||Assessing the condition of a joint and assessing cartilage loss|
|US9308095||Apr 27, 2012||Apr 12, 2016||Zimmer, Inc.||Femoral component for a knee prosthesis with improved articular characteristics|
|US9320605||Oct 24, 2012||Apr 26, 2016||Smith & Nephew, Inc.||High performance knee prostheses|
|US9326864||Sep 15, 2014||May 3, 2016||Depuy (Ireland)||Orthopaedic knee prosthesis having controlled condylar curvature|
|US9364896||Feb 7, 2013||Jun 14, 2016||Medical Modeling Inc.||Fabrication of hybrid solid-porous medical implantable devices with electron beam melting technology|
|US20070150067 *||Dec 27, 2005||Jun 28, 2007||Howmedica Osteonics Corp.||Hybrid femoral implant|
|US20080004709 *||Dec 29, 2006||Jan 3, 2008||Howmedica Osteonics Corp.||Laser-produced implants|
|US20080050412 *||Aug 15, 2006||Feb 28, 2008||Howmedica Osteonics Corp.||Antimicrobial implant|
|US20080140212 *||Nov 2, 2007||Jun 12, 2008||Robert Metzger||Elongated femoral component|
|US20080140214 *||Aug 15, 2006||Jun 12, 2008||Howmedica Osteonics Corp.||Femoral prosthesis|
|US20090043396 *||Sep 4, 2008||Feb 12, 2009||Komistek Richard D||Moment induced total arthroplasty prosthetic|
|US20090222016 *||Feb 23, 2009||Sep 3, 2009||Otismed Corporation||Total hip replacement surgical guide tool|
|US20090270868 *||Oct 29, 2009||Otismed Corporation||Generation of a computerized bone model representative of a pre-degenerated state and useable in the design and manufacture of arthroplasty devices|
|US20090326666 *||Dec 31, 2009||Wyss Joseph G||Posterior stabilized orthopaedic prosthesis|
|US20100016978 *||Jan 21, 2010||Depuy Products, Inc.||Antero-posterior placement of axis of rotation for a rotating platform|
|US20100016979 *||Jan 21, 2010||Depuy Products, Inc.||Knee prostheses with enhanced kinematics|
|US20100286788 *||May 7, 2009||Nov 11, 2010||Richard David Komistek||Anterior stabilized knee implant|
|US20130226305 *||Sep 9, 2011||Aug 29, 2013||Zimmer Gmbh||Femoral prosthesis with medialized patellar groove|
|US20130245777 *||Oct 28, 2011||Sep 19, 2013||Gerald J. Jerry||Knee system|
|US20140046452 *||Jul 31, 2013||Feb 13, 2014||New York University||Total knee replacement substituting function of anterior cruciate ligament|
|USD642263||Jul 26, 2011||Otismed Corporation||Arthroplasty jig blank|
|USD691719||Jun 22, 2011||Oct 15, 2013||Otismed Corporation||Arthroplasty jig blank|
|USRE43282||Aug 19, 2008||Mar 27, 2012||The Board Of Trustees Of The Leland Stanford Junior University||Assessing the condition of a joint and devising treatment|
|EP2754419A2||Feb 15, 2012||Jul 16, 2014||Conformis, Inc.||Patient-adapted and improved orthopedic implants, designs and related tools|
|WO2010088263A1||Jan 27, 2010||Aug 5, 2010||Zimmer, Inc.||Lateral condyle with posteriorly located inflection point for total knee implant|
|WO2013074143A1||Apr 27, 2012||May 23, 2013||Zimmer, Inc.||Tibial bearing component for a knee prosthesis with improved articular characteristics|
|WO2013074144A1||Apr 27, 2012||May 23, 2013||Zimmer, Inc.||Tibial bearing component for a knee prosthesis with improved articular characteristics|
|WO2013074145A1||Apr 27, 2012||May 23, 2013||Zimmer, Inc.||Tibial bearing component for a knee prosthesis with improved articular characteristics|
|U.S. Classification||623/20.35, 623/20.14|
|Oct 20, 2004||AS||Assignment|
Owner name: ZIMMER TECHNOLOGY, INC., ILLINOIS
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:DONKERS, RON;HARRIS, JAMES;PATMORE, AUDREY;AND OTHERS;REEL/FRAME:015268/0959;SIGNING DATES FROM 20031111 TO 20031113
|Feb 4, 2008||FPAY||Fee payment|
Year of fee payment: 4
|Feb 11, 2008||REMI||Maintenance fee reminder mailed|
|Dec 30, 2009||AS||Assignment|
Owner name: ZIMMER, INC., INDIANA
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:WALKER, PETER S.;REEL/FRAME:023708/0878
Effective date: 20091208
|Mar 10, 2010||AS||Assignment|
Owner name: ZIMMER, INC.,INDIANA
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:ANDRIACCHI, THOMAS P.;REEL/FRAME:024055/0270
Effective date: 20090930
|Jan 27, 2012||FPAY||Fee payment|
Year of fee payment: 8
|Jan 20, 2016||FPAY||Fee payment|
Year of fee payment: 12